Petunjuk itu penting.

Malay often leaves out the verb to be in simple sentences like this.

So where English says:

• The clue is important
• That instruction is important

Malay simply says:

• Petunjuk itu penting

This is very normal. In sentences where one noun or phrase is being described by an adjective, you usually do not need a word meaning is/are.

More examples:

• Rumah itu besar = The house is big
• Buku ini mahal = This book is expensive

Itu usually means that, but in many sentences it can also function a bit like the, depending on context.

So petunjuk itu can mean:

• that clue / that instruction
• or sometimes the clue / the instruction

In natural Malay, itu often points to something already known, already mentioned, or clear from the situation.

Compare:

• petunjuk = a clue / clue(s) / instruction(s) in a general sense
• petunjuk itu = that/the clue or that/the instruction

In Malay, adjectives usually come after the noun they describe.

So:

• petunjuk penting = an important clue / important instruction
• rumah besar = a big house
• buku lama = an old book

In Petunjuk itu penting, the structure is:

• petunjuk itu = the subject
• penting = the description (important)

So the sentence literally follows a pattern like:

• That clue — important

This is standard Malay word order.

By itself, petunjuk does not tell you clearly whether it is singular or plural. Malay nouns are often neutral about number unless the context makes it clear.

So petunjuk can mean:

• clue
• clues
• instruction
• instructions

In this sentence, learners often read it as singular because English translations often use the clue or that instruction, but the exact number depends on context.

If you really want to show plurality, Malay can use reduplication:

• petunjuk-petunjuk = clues / instructions

But in everyday Malay, context is very often enough.

Petunjuk can have a few related meanings, depending on context. Common ones include:

• clue
• hint
• guidance
• instruction
• direction

So Petunjuk itu penting could mean different things in different situations, such as:

• That clue is important
• Those instructions are important
• That guidance is important

This is very common in Malay: one word can cover several English words, and context tells you which meaning is intended.

Yes. Ini means this, while itu means that.

So:

• Petunjuk ini penting = This clue/instruction is important
• Petunjuk itu penting = That clue/instruction is important

Use ini for something closer to the speaker, and itu for something farther away, less immediate, or already mentioned.

Yes, it is perfectly natural and standard Malay.

It works well in both spoken and written language. Depending on context, it could sound slightly formal if petunjuk means guidance or instructions, but the sentence itself is completely normal.

For example, it could fit in:

• a detective context: That clue is important
• a manual or sign: Those instructions are important
• advice or guidance: That guidance is important

A simple guide:

• petunjuk ≈ peh-TOON-jook
• itu ≈ EE-too
• penting ≈ pen-TING

A few helpful notes:

• u in Malay is usually like oo in food
• e in pe- and pen- is often a light, relaxed vowel
• ng in penting is like the ng in sing

Malay pronunciation is generally quite consistent, so once you know the sound system, words are usually pronounced as written.

Usually, the most neutral and standard order is:

• Petunjuk itu penting

Putting penting first can be possible in special contexts for emphasis or literary style, but it is not the normal beginner pattern.

So if you are learning standard Malay sentence structure, use:

• subject + description
• Petunjuk itu penting

That is the safest and most natural choice.

No. Penting stays the same.

Malay adjectives do not change for:

• singular vs plural
• masculine vs feminine
• definite vs indefinite

So penting works the same in all of these:

• buku penting = important book
• maklumat penting = important information
• petunjuk itu penting = that clue/instruction is important

This is one of the nice things about Malay grammar: there is very little agreement to memorize.